Re: [PATCH v9 00/12] Add MSI-X support on pcitest tool

From: Kishon Vijay Abraham I
Date: Mon Jul 16 2018 - 00:07:58 EST


Hi,

On Friday 13 July 2018 09:29 PM, Gustavo Pimentel wrote:
> Hi Lorenzo,
>
> On 13/07/2018 14:25, Lorenzo Pieralisi wrote:
>> On Mon, Jul 09, 2018 at 06:42:38PM +0100, Gustavo Pimentel wrote:
>>> Patch series made against Lorenzo's master branch.
>>>
>>> Fix EP link notification implementation.
>>>
>>> Add MSI-X support on pcitest tool.
>>>
>>> Add new callbacks methods and handlers to trigger the MSI-X interrupts
>>> on the EP DesignWare IP driver.
>>>
>>> Allow to set/get MSI-X EP maximum capability number.
>>>
>>> Rework on set/get and triggering MSI methods on EP DesignWare IP driver.
>>>
>>> Add a new input parameter (msix) to pcitest tool to test MSI-X feature.
>>>
>>> Update the pcitest.sh script to support MSI-X feature tests.
>>>
>>> Gustavo Pimentel (12):
>>> PCI: dwc: Fix EP link notification implementation
>>> PCI: endpoint: Add MSI-X interfaces
>>> PCI: Update xxx_pcie_ep_raise_irq() and pci_epc_raise_irq() signatures
>>> PCI: dwc: Add MSI-X callbacks handler
>>> PCI: dwc: Rework MSI callbacks handler
>>> PCI: dwc: Add legacy interrupt callback handler
>>> pci-epf-test/pci_endpoint_test: Cleanup PCI_ENDPOINT_TEST memspace
>>> pci-epf-test/pci_endpoint_test: Use irq_type module parameter
>>> pci-epf-test/pci_endpoint_test: Add MSI-X support
>>> pci_endpoint_test: Add 2 ioctl commands
>>> tools: PCI: Add MSI-X support
>>> PCI: endpoint: Add MSI set maximum restriction
>>>
>>> Documentation/PCI/endpoint/pci-test-function.txt | 8 +-
>>> Documentation/ioctl/ioctl-number.txt | 1 +
>>> Documentation/misc-devices/pci-endpoint-test.txt | 6 +
>>> drivers/misc/pci_endpoint_test.c | 260 ++++++++++++++++------
>>> drivers/pci/controller/dwc/pci-dra7xx.c | 2 +-
>>> drivers/pci/controller/dwc/pcie-artpec6.c | 2 +-
>>> drivers/pci/controller/dwc/pcie-designware-ep.c | 217 ++++++++++++++++--
>>> drivers/pci/controller/dwc/pcie-designware-plat.c | 11 +-
>>> drivers/pci/controller/dwc/pcie-designware.h | 31 ++-
>>> drivers/pci/controller/pcie-cadence-ep.c | 3 +-
>>> drivers/pci/controller/pcie-rockchip-ep.c | 2 +-
>>> drivers/pci/endpoint/functions/pci-epf-test.c | 86 +++++--
>>> drivers/pci/endpoint/pci-ep-cfs.c | 24 ++
>>> drivers/pci/endpoint/pci-epc-core.c | 68 +++++-
>>> include/linux/pci-epc.h | 16 +-
>>> include/linux/pci-epf.h | 1 +
>>> include/uapi/linux/pcitest.h | 3 +
>>> tools/pci/pcitest.c | 51 ++++-
>>> tools/pci/pcitest.sh | 15 ++
>>> 19 files changed, 664 insertions(+), 143 deletions(-)
>>
>> Gustavo, Kishon,
>>
>> it seems like this series has been thoroughly reviewed and it is
>> ready to go, please let me know if there is any pending change.
>
> I just sent the patch # 10 based on Kishon's latest review.
> For me it's nearly perfect. :)

I got to test this series today and I found one issue.

use this sequence:
1) pcitest -i 2 /* change to MSIX irq type */
For platforms that doesn't support MSIX, get the following message
pci-endpoint-test 0000:01:00.0: Failed to get MSI-X interrupts
SET IRQ TYPE TO MSI-X: NOT OKAY

However after this, pci_endpoint_test_set_irq() will invoke
pci_endpoint_test_free_irq_vectors() and pci_endpoint_test_release_irq().
This will free previously allocated MSI irq vectors.

2) pcitest -i 1 /* change to MSI irq type */

This will not invoke pci_endpoint_test_alloc_irq_vectors() and
pci_endpoint_test_request_irq() since now "if (irq_type == req_irq_type)"
will return true.

After this MSI tests will fail.

Other than this failing sequence, the series looks good to me.

Thanks
Kishon